/**
 * Copyright © 2019 同程艺龙 (zhihui.li@ly.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.ly.train.flower.common.lifecyle;

import java.util.concurrent.atomic.AtomicBoolean;

/**
 * @author leeyazhou
 * 
 */
public abstract class AbstractLifecycle extends AbstractInit implements Lifecycle {

  private AtomicBoolean running = new AtomicBoolean();

  @Override
  public boolean isRunning() {
    return running.get();
  }

  @Override
  public void start() {
    if (running.compareAndSet(false, true)) {
      init();
      doStart();
    }
  }


  @Override
  public void stop() {
    if (running.compareAndSet(true, false)) {
      doStop();
    }
  }

  @Override
  protected void doInit() {}

  protected abstract void doStart();

  protected abstract void doStop();
}
